package com.phonemap;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.appengine.api.datastore.Entity;
import com.google.appengine.api.datastore.Key;
import com.google.appengine.api.datastore.KeyFactory;
import com.phonemap.common.Util;
import com.phonemap.models.ViewType;

@SuppressWarnings("serial")
public class ViewTypeServlet extends BaseServlet {
	private static final Logger logger = Logger.getLogger(ViewTypeServlet.class
			.getCanonicalName());

	/**
	 * Get the requested customer entities in JSON format
	 */
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		
		super.doGet(req, resp);
		logger.log(Level.INFO, "Obtaining ViewType listing");
		String searchFor = req.getParameter("q");
		PrintWriter out = resp.getWriter();
		Iterable<Entity> entities = null;
		if (searchFor == null || searchFor.equals("")) {
			entities = ViewType.getAllViewTypes();
			out.println(Util.writeJSON(entities));
		} else {
			Entity e =  ViewType.getViewType(searchFor);
			  if (e != null) {
				Set<Entity> result = new HashSet<Entity>();
				result.add(e);
				out.println(Util.writeJSON(result));
			  }
		}
		return;
	}

	/**
	 * Insert the new customer
	 */
	protected void doPut(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		logger.log(Level.INFO, "Creating ViewType");
		
		String name = req.getParameter("viewTypeName");
		ViewType.createOrUpdateViewType(name);
	}

	/**
	 * Delete the customer
	 */
	protected void doDelete(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		String name = req.getParameter("id");
		logger.log(Level.INFO, "Deleting ViewType {0}", name);
		Key key = KeyFactory.createKey("ViewType", name);
		try {
			// CASCADE_ON_DELETE
			Util.deleteFromCache(key);
			Util.deleteEntity(key);
		} catch (Exception e) {
			String msg = Util.getErrorResponse(e);
			resp.getWriter().print(msg);
		}
	}

	/**
	 * Redirect the call to doDelete or doPut method
	 */
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		String action = req.getParameter("action");
		if (action.equalsIgnoreCase("delete")) {
			doDelete(req, resp);
			return;
		} else if (action.equalsIgnoreCase("put")) {
			doPut(req, resp);
			return;
		}
	}
}
